Printing telegraphy.



I. KITSEE PRINTING TELEGRAPHY.

APPLICATION FILED APR.3,1909.

1 $324,205. Patented Apr. 23, 1912.,

IN VENTOR.

WITNESSES UNITED STATES PATENT OFFICE.

ISIDOR KITSEE, 0F PHILADELPHIA; PENNSYLVANIA.

PRINTING TELEGRAPHY.

Application filed April 3,

To all whom it may concern:

Be it known that I, ISIDOR Krrsnn, citizen of the United States, residing at Philadel-f' phia in .the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Printing Telegraphy, of which the following is a specification. v i My invention relates to an improvement in printing telegraphy and has more special reference to such printing systems wherein a grouping of dots and dashes is required for the purpose of operating necessary eleotromagnets to select the required type. As one of the best known types of such system, I take the ingenious Barclay system now employed by one of the largest telegraph companies this country as an example. In the Ba 'lay printing system, the printing of each letter 'or character requires the transmission of six impulses forming at the receiving station three telegraphic characters,-dots or dashes as the case may be. In the line is inserted a polarized relay with unbiased armature. Each telegraphic character,-the dot as well as dash,-commences. with an impulse of one polarity and ends with an impulse of opposite polarity, the time unit between the two impulses denoting the dot or dash. At the receiving station, the tongue of the unbiased line relay rests normally against a passive stop and is broughtin connection with an active contact through the first impulse transmitted and rests against this contact until the impulse of opposite polarity moves it again to its normal position. Therefore, the greater or shorter time of contact between the tongue and the forward stop denotes the dot or dash; This relay is operatively related to a local circuit containing two re-' lays,one answering indifl'erently to a'dot well as dash and the second answering only to a dash. These two relays then control the selective relays and they in turn select and operate the desired type.

I have found thatit is possible to reduce the impulses necessary to print the desired letter or numeral from the six impulses now used in the Barclay printer to three impulses; Instead of making use of the length of time between two transmitted impulses to denote a dot or dash, I differentiate between Specification Of'LQttClS Patent.

Patented Apr. 23, 1912. 1909. Serial no. 487,672.

the dot and dash by the different polarity of the impulse transmitted ;-the impulse for the dash being of the same short duration as the impulse for the dot. In the line of transmission, I insert one polarized relay with the tongue or armature biased in a manner so that the same shall normally assume a zero position out of electrical connection with both the right as well as left contact. The ton ue of this relay will'move in one direction trough the impulse of one polarity and will move in an opposite direction through the im ulse of opposite polarity, and will, thereibre, connect with the contact either to the right or left. But the connection, no matter if to the right or left, will only be .a momentary one, as the impulse transmitted will always beof short and practically the same duration. This biased relay will perform the function of the unbiased line relay of the B'arcla sys tem of today. To givean example :-1n the Barclay printer referred' to, one dash sucpose of selecting and printing the letter a. At the transmitting station, through an automatic tape arrangement, a positive impulse is transmitted followed at an interval of about three units of time by a negative impulse. At the receiving station, the unbiased tongue of the line relay is driven, through the first im ulse, to the contact stop and stays there f dr the length of time required for a dish. The second impulse drives the unbiased armature again to its normal place, and when the operator then transmits a positive and negative impulse in quick succession, it is translated at the receiving station into a dot; and the same is the case in producing the second dot. Of the two local relays above mentioned, both relays will answer to the production of a dash, but only one relay the dot is produced.

In my ."ystem, to produce a dash, I make use of one short impulse of a predetermined polarity-say a negative polarity-and to produce a dot I make use of a short impulse of predetermined opposite polaritysay a positive polarity. To produce, therefore, according to my system the required dash and two dots atthe receiving station, it is only necessary for me to transmit first one ceeded by two dots is required for the pin-- will answer when In the drawing, I have only illustrated the line relay and the two local relays opa dash is symbolized by a negative impulse eratively related thereto. All other arrange- -ments and devices are well known to persons used versed in the Barclay printing system This by the telegraph companies ofto-day. drawing is a cuit embodyingmy In this drawing, 1 is the line of transmission; 2 is the polarized line relay; 3 is its tongue or armature; biased or held in zero position by the springs 4, 4:; 5 is the contactstop to the left and 6 the contact-stop to the right. To these contact-stops is connected the split battery 7 8. these two batteries is connected the wire 9 forming a local circuit and in this local :circuit are inserted the two relays 20 and21. The relay 20 is of the polarized type and its armature 14 is biased and held by the spring in contact with the stop 10. The armature of this relay is provided with means so as to prolong itsconnection with the contact 11 when the relay is operated. These means are here shown as a spring 13 provided with the contact. In other words, when the relay is made operative, the armature 14 is drawn toward the contact 11, but does not come to resttill it is estopped by the stop 12. In technic, such relay is called the dash-re- .lay, as it is able to translate even the shortest impulse invent-ion.

into an impulse of a duration denoting a dash. The relay 21 is of a type answering to both positive as well as negative impulses and its armature 15 is held against the stop 19, and is brought in connection with the contact 16 when the electromagnet is energized.

The operation of this arrangement is as follows :-It is supposed that the operator desires to transmit a group of signals, whereby at the receiving station the letter a is produced. This group of signals, according to the Barclay system, consists of a dash followed by two dots. It is taken for granted that in my system, as described,

and a dot by a positive impulse, as hereto- .fore stated. The operator, therefore, transmits first a negative impulse of short duration; It is taken for granted that this impulse will actuate the line -relay 2 in a manner, so that the tongue or armature 3 will move to the left, and will connect with the contact 5, thereby closing a circuit including the battery 7 Through the closing of this circuit, a current .will flow from the battery 7 -in the direction of the unfeathered arrow.

diagrammatic view of the cir-' At the junction of This current flow will actuate the relay 21 which is of the unpolarized type, and it is taken for granted that the arrangement of the polarized relay 20 is such that the same will also be operated through an impulse in this direction, and that, therefore, the armature or tongue 14 of said relay will move toward to and in connection with the contact 13. Through the operation of the relay 21 its local circuit 25 and 26 will beclosed for-a short time, butthe operation of the relay 20 will close its local circuit 27 and 28 for a longer time, a time sufficient to denote a dash. The operator then transmits two short impulses of positive polarity denot ing dots. These impulses will actuate at the receiving station the line-relay 2 in a manner so that the tongue will move toward the right and will momentarily connect with the contact 6, thereby establishing a circuit including the battery 9, and the current will flow in the direction of the feathered arrow. But as the relay 20 is polarized in a manner so as to remain inoperative through the flow of a current in this direction, it follows that its armature 14 will remain at rest at the stoplO, but the unpolarized relay 21 will answer and will close its local circuit 25, 26, for a short period denoting a dot. In these local circuits 25, 26, and 27, 28, the necessary means are included to select and print the required letter or numeral.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. In telegraphy, a line of transmission, a polarized and biased relay inserted in said line of transmission, a local circuit for said relay, two sources of current for said local circuit; two relays inserted in said circuit; one of said relays answering to an impulse of positive as well as negative polarity, and one of said relays answering only to an impulse of one polarity, provided with means to translate an impulse of short duration into an impulse of comparatively long duration and an additional local circuit for each of said local relays.

2. In a telegraphic system, means to receive impulses of a like duration but opposite polarity and translate the sa into dots and dashes, said means compri g a polarized line-relay, a biased armature for said relay, two contacts for said armature, the armature normally out of connection with any of said contacts; a source of current connected to each of said contacts; a local circuit for said sources; two relays for said circuit; one of said relays answering to an impulse of either direction; the second of said relays answering to an impulse onlyof one direction, to translate said impulse into a dash.

3. In telegraph means to translate received impulses 0 same duration but opposaid second relay the means insaid clrcu'it to site polarity into dots and dashes, said means comprising a polarized line-relay,

source of current adapted to send an impulse of one direction through the contactmg of the armature with one contact, and

to send an impulse of opposite polarity through the contacting of the armature with opposite contact;

translate an im pulse of one polarity into a dot and an impulse of opposite polarity into a dash.

,4. In telegraphy, means to receive impulses of opposlte polarity but of substantially the same duration and translate the same locally, said means com rising a line relay, two contacting points or said relay, a source'of current connected to each contacting point, a local circuit connected to 'bothof said sources andladapted vto transmittherethrough-an im ulseof one direction through the contacting of the movable part of [said relay j 'with' one contact, and

- adapted to, atransmit -the'rethrough an im- "pulse of opposite direction through .the con,

tacting'of saidniovable pm with the opposite contact; andmeans in said local circuit to translate an impulse of one direction into electro-magnetic adapted to be operated by a dot and means in said local circuit to translate an impulse of opposite direction into a dash. i

5. In combination with a. line of transmission, a polarized relay, the armature normally at the zero position; two contacts for said armature,-a local circuit for each of said contacts; two relays in said local circuit; one relay both polarities,

one relay answering only to each of said relays to operate a second local circuit.

6. In a system of telegraphy, a line-relay of positive and negative p0 circuit operatively related to said line-rela answering to an impulse. of?

short impulses arity, allocalized two additional local circuits and means in said first local circuit to close for an impulse of' one polarity one of said additional local circuits for a short time and-for an impulse of opposite polarity both offlsaid additional local circuits, one for a short I a In testimon "whereof I a x my signature time and the. other for a lon er time.

in presence o I two witnesses.

' Witnesses;- I

' EnrrH R. STILLEY,

MARY C, ,SMITH;

ISIDOR KITSEEQ 

